Question

5 g of compound A reacts with 10 g of compound B to produce a new compound C. What should be the mass of C according to law of conservation of mass?

• A. 10 g
• B. 5 g
• C. 15 g
• D. 50 g

Answer 1

The correct option is C 15 g

As from the law of conservation of mass- Total mass of the reaction mixture at instant is constant.And for the reaction that goes 100% completion,
Mass of reactants = Mass of product. Therefore, Mass of compound A+Mass of compound B=Mass of compound C
So, Mass of compound C=10 g+5 g=15 g